New NodW- or NifA-Regulated Bradyrhizobium japonicum Genes
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چکیده
منابع مشابه
NodV and NodW, a second flavonoid recognition system regulating nod gene expression in Bradyrhizobium japonicum.
In Bradyrhizobium japonicum, members of two global regulatory families, a LysR-type regulator, NodD1, and a two-component regulatory system, NodVW, positively regulate nod gene expression in response to plant-produced isoflavone signals. By analogy to other two-component systems, NodV and NodW are thought to activate transcription via a series of phosphorylation steps. These include the phospho...
متن کاملNew target genes controlled by the Bradyrhizobium japonicum two-component regulatory system RegSR.
RegSR-like proteins, members of the family of two-component regulatory systems, are present in a large number of proteobacteria in which they globally control gene expression mostly in a redox-responsive manner. The controlled target genes feature an enormous functional diversity. In Bradyrhizobium japonicum, the facultative root nodule symbiont of soybean, RegSR activate the transcription of t...
متن کاملInfluence of oxygen on DNA binding, positive control, and stability of the Bradyrhizobium japonicum NifA regulatory protein.
Central to the genetic regulatory circuit that controls Bradyrhizobium japonicum nif and fix gene expression is the NifA protein. NifA activates transcription of several nif and fix genes and autoregulates its expression during symbiosis in soybean root nodules or in free-living microaerobic conditions. High O2 tensions result in the lack of nif expression, possibly by inactivation of NifA thro...
متن کاملThiosulfate-dependent chemolithoautotrophic growth of Bradyrhizobium japonicum.
Thiosulfate-oxidizing sox gene homologues were found at four loci (I, II, III, and IV) on the genome of Bradyrhizobium japonicum USDA110, a symbiotic nitrogen-fixing bacterium in soil. In fact, B. japonicum USDA110 can oxidize thiosulfate and grow under a chemolithotrophic condition. The deletion mutation of the soxY(1) gene at the sox locus I, homologous to the sulfur-oxidizing (Sox) system in...
متن کاملChemotaxis of Bradyrhizobium japonicum to soybean exudates.
The chemotactic response of Bradyrhizobium japonicum toward soybean seed and root exudates was examined. Assays using various isoflavones and fractionated exudate indicated that isoflavones are not the principal attractants in exudates. Likewise, induction of nod genes with isoflavones or seed exudate before assay did not enhance chemotaxis. Screening of numerous compounds revealed that only di...
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ژورنال
عنوان ژورنال: Molecular Plant-Microbe Interactions®
سال: 2003
ISSN: 0894-0282,1943-7706
DOI: 10.1094/mpmi.2003.16.4.342